There's d-sub com port on the back, but I never even thought to try and connect it. I haven't needed to change any of the settings. From the documentation it just has the usual, like turn on and off delays, low battery shutdown %, sensitivity to mains voltage high or low conditions etc.
I'm currently also refurbishing an eaton ex 2200, which is maybe 10 years old, and still it was difficult to track down the software. Haven't got it working yet.
I get the feeling the moment that a UPS manufacturer moves to the next model, the old ones and all support are buried in tombs. I figure that the business models demand that they push out new models constantly. This is reinforced by the fact that all my UPS units are salvaged - they were all destined for the garbage dump. Companies and workplaces replace the batteries maybe once, then turf the whole unit even though nothing else is wrong with them.